Foam disk pig

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Description

FIG. 1 is a perspective view of the foam disk pig, the opposite side being identical to that shown, and the bottom is identical to the top shown;

FIG. 2 is a side view of the foam disk pig; and,

FIG. 3 is a top view of the foam disk pig.

Referenced Cited
U.S. Patent Documents
1583982 May 1926 Long
1756378 April 1930 Oberhuber
3857132 December 1974 Knapp et al.
4244073 January 13, 1981 Sazawa
4603449 August 5, 1986 Knapp
Patent History
Patent number: D351898
Type: Grant
Filed: Jul 21, 1992
Date of Patent: Oct 25, 1994
Assignee: Pipeline Dehydrators, Inc. (Houston, TX)
Inventor: Herbert L. Stowers, Jr. (Bellaire, TX)
Primary Examiner: A. Hugo Word
Assistant Examiner: Eric Watterson
Law Firm: Harris, Tucker & Hardin
Application Number: 7/917,605
Classifications